Disorder-induced stabilization of the pseudogap in strongly correlated systems.

@article{Chiesa2008DisorderinducedSO,
  title={Disorder-induced stabilization of the pseudogap in strongly correlated systems.},
  author={Simone Chiesa and Prabuddha B. Chakraborty and Warren E. Pickett and Richard T. Scalettar},
  journal={Physical review letters},
  year={2008},
  volume={101 8},
  pages={
          086401
        }
}
The interplay of strong interaction and strong disorder, as contained in the Anderson-Hubbard model, is addressed using two nonperturbative numerical methods: the Lanczos algorithm in the grand canonical ensemble at zero temperature and quantum Monte Carlo simulations. We find distinctive evidence for a zero-energy anomaly which is robust upon variation of doping, disorder, and interaction strength. Its similarities to, and differences from, pseudogap formation in other contexts, including… 

Figures from this paper

Mechanism for Enhanced Disordered Screening in Strongly Correlated Metals: Local vs. Nonlocal Effects
We study the low temperature transport characteristics of a disordered metal in the presence of electron–electron interactions. We compare Hartree–Fock and dynamical mean field theory (DMFT)
Effects of strong correlations on the disorder-induced zero-bias anomaly in the extended Anderson–Hubbard model
TLDR
It is found that strong correlations have a significant effect on the ZBA at half-filling, and enhance theZBA gap when the interaction is finite ranged.
Zero bias anomaly in the two-site Anderson-Hubbard model with Gaussian distribution for disorder
The Anderson-Hubbard model considers the correlation between disorder and other interactions in a strongly correlated electron system. Both disorder and correlations drive the metal-insulator
Anderson-Hubbard model with box disorder: Statistical dynamical mean-field theory investigation
Strongly correlated electrons with box disorder in high-dimensional lattices are investigated. We apply a statistical dynamical mean-field theory that treats local correlations nonperturbatively. The
Anderson localization versus charge-density-wave formation in disordered electron systems
We study the interplay of disorder and interaction effects including bosonic degrees of freedom in the framework of a generic one-dimensional transport model, the Anderson-Edwards model. Using the
Persistence of energy-dependent localization in the Anderson–Hubbard model with increasing system size and doping
  • P. DaleyR. Wortis
  • Physics
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2016
TLDR
It is demonstrated that the effect in interacting systems persists away from half filling, and moreover that energy regions with suppressed localization continue to appear in ensembles of larger systems despite a loss of sharp features in the density of states.
Emergence of a Novel Pseudogap Metallic State in a Disordered 2D Mott Insulator
It is well established that for non-interacting electrons, increasing disorder drives a metal into a gapless localized Anderson insulator. While in three dimensions a threshold in disorder must be
Single-Particle Excitations under Coexisting Electron Correlation and Disorder: A Numerical Study of the Anderson―Hubbard Model
Interplay of electron correlation and randomness is studied using the Anderson–Hubbard model within the Hartree–Fock (HF) approximation. Under the coexistence of short-range interaction and diagonal
Giant Magnetoresistance in Hubbard Chains.
TLDR
It is shown that the one-dimensional Hubbard model with periodically distributed on-site interactions already contains the minimal ingredients to display the phenomenon of magnetoresistance; by applying an external magnetic field, a dramatic enhancement on the charge transport is achieved.
Disorder unveils Mott quantum criticality behind a first-order transition in the quasi-two-dimensional organic conductor κ−(ET)2Cu[N(CN)2]Cl
We show the significant impact of weak disorder on the Mott transition by investigating electronic transport in a systematically x-ray-irradiated layered organic conductor under continuous pressure
...
...